CVE-2026-59204
Medium
Elevated severity or exploit probability.
CVSS base
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS — probability of exploitation (30 days)
0.7%
49.2th percentile
CISA KEV
Not listed
Weakness / dates
CWE-770
Published 2026-07-14 · modified 2026-07-21
Description
Pillow is a Python imaging library. From 8.2.0 through 12.2.0, src/libImaging/Jpeg2KDecode.c accumulates total_component_width across every tile in a JPEG2000 image instead of recomputing it per tile, allowing a crafted tiled JPEG2000 file to force substantially higher transient memory usage and trigger out-of-memory failures during decoding. This issue is fixed in version 12.3.0.
Affected
References
- https://github.com/python-pillow/Pillow/commit/13ada41172142f2fd9f0906f615a00ea623a11ca
- exploit https://github.com/python-pillow/Pillow/pull/9704
- https://github.com/python-pillow/Pillow/releases/tag/12.3.0
- exploit https://github.com/python-pillow/Pillow/security/advisories/GHSA-vjc4-5qp5-m44j
- exploit https://github.com/python-pillow/Pillow/security/advisories/GHSA-vjc4-5qp5-m44j